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    // 构造函数创建对象 构造函数构造对象的过程称之为 实例化
    function Book(bookName, pricre, author) {
        this.bookName = bookName;
        this.pricre = pricre;
        this.author = author;
        this.read = function () {
            console.log('阅读了' + this.bookName);
        }
    }

    // 构造出来的对象 称之为 Book函数的实例
    var book1 = new Book('白夜行', '42.00', '东');
    book1.read();

    var book = new Book('谁的青春不迷茫', '38.00', '刘同');
    book.read();

    // 人的构造函数
    function Person(myName, bk) {
        this.myName = myName;
        // book 对象是 人这个对象的属性
        this.bk = bk;
    }

    // p1 这个人
    var p1 = new Person('老周', book); //创建了一个人叫老周 他有一本书叫 《谁的青春不迷茫》
    p1.bk.read(); //读取书名;

    var p2 = new Person('老王', book1);
    p2.bk.read(); 



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